CHAPTER 9.
Reading edition
1837-1839: AGE 30-32.
Invitation to Professorships at Geneva and Lausanne.—Death of his Father.—Establishment of Lithographic Press at Neuchatel. —Researches upon Structure of Mollusks.—Internal Casts of Shells. —Glacial Explorations.—Views of Buckland.—Relations with Arnold Guyot.—Their Work together in the Alps.—Letter to Sir Philip Egerton concerning Glacial Work.—Summer of 1839.—Publication of "Etudes sur les Glaciers."